But then again, neither does just-announced guest star Edward James Olmos. Series regular Lauren Velez, who portrays Lt. Maria LaGuerta, tells Latina that Olmos' character will be "about salvation … I don't think Eddie is going to be Dexter's nemesis."

Huh. Maybe Dexter will just catch up on paperwork this season?

Olmos, star of "Battlestar Galactica," and "Stand and Deliver," will play a brilliant and charismatic religious studies professor.

Still on the list of potential bad guys? Colin Hanks, as an expert on ancient artifacts who gets linked to a series of horrific murders, and rapper/actor Mos.